1.3 GENERATIONS OF COMPUTERS

FIRST GENERATIONS COMPUTERS(1945-1956)

Components used – Vacuum tubes or thermionic valves.
Memory - 10,000 to 20,000 characters.
Operating speed – Milli seconds.
Languages used - machine (Binary) language

SECOND GENERATIONS COMPUTERS (1956-1963)
Components used –Transistors.
Memory –Up to 64,000 characters.
Operating speed –Micro seconds.
Languages used - Assembly language

THIRD GENERATIONS COMPUTERS (1964-1971)

Components used –integrated circuits
Memory –Upto 4 million characters.
Operating speed –Micro seconds.
Languages used – BASIC, FORTRAN, COBOL, PASCAL, C.

FOURTH GENERATIONS COMPUTERS (1971-1990)

Components used –micro processors.
Memory –semi conductor memory.
Operating speed –1 to 10 nana seconds .
Languages used –4GL

FIFTH GENERATIONS COMPUTERS (Present and beyond)

Components used –Artificial intelligency
Memory –CMOS.
Operating speed –1 to 100 nana seconds .
Languages used – Artificial intelligence